For my chapter 7 Excel assignment, when entering answers into my excel sheet with the correct formula, it keeps saying incorrect and marking me as wrong. I am putting the exact right formulas and it corrected me to the exact thing I typed in, what am I doing wrong? There are posts about this excel sheet but none of the formulas are counting as correct.

Expected Cash collections:

March Cash collections $ 5,100

^ Formula for that cell: ='Budget Data'!D5